containing more than 2,000 historic buildings and sites such as Alcatraz, and a number of military forts and gun batteries, including a forgotten Civil War fortification at Fort Mason, the Black Point Battery. He co-directed the archaeological excavation of the battery with Martin T. Mayer. He also led the park's early efforts to survey, characterize, and restore elements of the Adolph Sutro Historic District, which included Sutro heights, the grounds of the estate of Adolph Joseph Heinrich Sutro, developer of much of San Francisco's "Outside Lands," and onetime Mayor, as well as Sutro's Cliff House, San Francisco and the ruins of the Sutro Baths. All of this was part of the relatively new park's initial assessment of cultural resources within its boundaries and determining what was significant. As the first historian for the park, he, along with the park's first archaeologist, Martin T. Mayer, and its first historic architect, J. Patrick Christopher, completed the initial inventory and the first cultural resources management plan for the Golden Gate National Recreation Area. His destiny might have been as a land-focused historian and archaeologist if he were not transfixed by the sight of the gold rush-era ship Niantic's unearthed timbers in San Francisco's Financial District when he was 20. Delgado worked with archaeologist Dr. Allen Pastron[1] on several excavations beginning in 1979. Among the buried ships from 1849 to 1851 that he would help excavate or analyze are the storeships Niantic and General Harrison, the ships William Gray and Candace, and many more. He also learned to scuba dive during his NPS tenure and worked closely with the Park Service's Submerged Cultural Resources Unit after the NPS sent him to the Presidio of San Francisco to attend an Army dive class. He was involved in wreck surveys both inside and outside NPS jurisdiction, including the first NPS surveys off Point Reyes National Seashore, Channel Islands National Park, and Cape Cod National Seashore, Pearl Harbor, where he studied the USS Arizona and , and at Bikini Atoll in the Pacific, where he worked with the team on the atomic-bombed ships of Operation Crossroads, the world's first nuclear tests (1946). He was the principal author of the final National Park Service study on the Bikini Atoll wrecks. Those shipwrecks include the aircraft carrier USS Saratoga, Japanese battleship Nagato, the battleship USS Arkansas, the destroyer USS Lamson, the attack transport USS Gilliam, the attack transport USS